Nhận biết (M1)

Residents of Cairo, Egypt, rely on its rapid transit system, the Cairo Metro, for millions of trips each year. __________ city officials strive to maintain the system’s 71 stations to ensure each of these journeys is as smooth as possible.

Which choice completes the text with the most logical transition?

• A.

  For this reason,

• B.

  For example,

• C.

  However,

• D.

  Alternatively,